[Duct Reducer]: Connect two ducts of different diameters or connect ducting to an inline fan/extractor vent. Suitable for flexible or rigid metal ducting where space is a constraint. [Size]: One side features a 200mm female socket - Fits inside 200mm flexible ducting. Outer diameter - 205mm, Inner diameter - 200mm. The other side has a 150mm male spigot - Fits into 150mm ducting. Outer diameter - 148mm, Inner diameter - 143mm, Total thickness - 2.7mm, Height - 110mm. [Application]: Duct reducer designed for wide use, such as air-cooled hoods, garages, attics, bathroom kitchen extractor fans, hydroponics, and HVAC ventilation systems. Rigid plastic ducting is perfect for DIY and professional use. [Easy to Install PVC Reducer]: No tools are required to install the duct adapter, and our precise sizing makes it easy to fit your ducting. Ideal for all dryer pipes/hoses, bathroom vents and extractors, air conditioners, kitchen hoods and vents, heat transfer and ventilation systems, gas and electric dryers, range hood fans, as well as a variety of industrial, DIY, and professional applications. Note: Before purchasing, measure the inner and outer diameters of the connection parts. The inner diameter of the hose must be larger than the outer diameter of the reducer, and the fan must be smaller than the inner diameter of the reducer. Color: White Material: plastic Specification: 150-200mm Package Contents: 1 x Duct Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is +/- 1-3 cm.